论文部分内容阅读
本文报道了５２８名接触非稳态噪声的冷作工、锻工及冲压工听力损失的调查结果，并以接触噪声等效连续Ａ声级７０ｄＢ以下的技术人员９５名作对照。调查结果：作业场所噪声等效连续Ａ声级在８５～１１５ｄＢ，语频听力损失率（简称听损率）为２３．０％，高频听力损失率（简称高频听损率）为８３．７％，高频听损和听损发生率与噪声声级和接触噪声工龄密切相关，与对照组相比有极显著性差异（Ｐ＜０．００５）。应用调查结果，采用多元非线性回归分析，得回归方程式Ｙ＝３４．２１３５ ，用此公式计算听力损失率与本次调查实测值及ＩＳＯ公布的有关听觉的资料十分接近，故认为该方程式可预测暴露在非稳态噪声中的作业人员听损率。此方法符合实际，简单易行，具有实用价值，可用于工矿企业等基层单位听力损失的早期初筛。
In this paper, the survey results of 528 cold working, forging workers and punching workers exposed to unsteady noises were compared with 95 technicians with the equivalent continuous A sound level of 70dB below the contact noise. The results of the survey showed that the noise level of working site was 85 ~ 115dB, the audible hearing loss rate was 23.0%, and the high frequency hearing loss rate was 83. The incidence of high frequency hearing loss and hearing loss was closely related to the noise level and the contact age. There was a significant difference (P <0.005) compared with the control group. Application of the survey results, the use of multivariate non-linear regression analysis, the regression equation Y = 34.2135, using this formula to calculate the hearing loss rate and the survey data and ISO published auditory data is very close, so that the equation can be predicted Operator exposure to unsteady noise. This method is in line with the reality, simple and practical, with practical value, can be used for industrial and mining enterprises and other grass-roots units early hearing loss screening.